OAKLAND -- Investigators will review video surveillance tapes from outside Oracle Arena and along Interstate 880 for leads into the fatal freeway shooting Thursday night of two men on their way home from the Golden State Warriors playoff game, authorities said Friday.

One of the men, ejected from the white 2010 Porsche Panamera that was sprayed by gunfire, was also hit by a van, authorities said.

The Alameda County Coroner's Office identified the driver as a 30-year-old Christopher Beardon, of Pittsburg, and the passenger as Terrance Marks, 28, of Richmond. The shooting happened about 10:35 p.m. in the northbound lanes of I-880 near Jackson Street.

Police said someone in another vehicle opened fire on the Porsche, hitting it multiple times and causing it to crash into the center divider.

The impact caused Marks to be ejected, and he was hit by a van, whose driver kept going.

Both men were pronounced dead at the scene.

It is believed both men were killed by gunfire, but an autopsy will confirm if the injuries sustained by the ejected man may have contributed to his death, authorities said. Both deaths are being classified as homicides.

Oakland police, who are investigating the killings, said they do not have a motive yet. Surveillance tapes will be reviewed to see if it was possibly a case of road rage.

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Authorities said both men were wearing Golden State Warriors garb and had tickets to Thursday night's playoff game, which had ended a short time before the shooting with the Warriors losing to the San Antonio Spurs, 94-82.

Police said dozens of vehicles passed by the scene before the California Highway Patrol shut down the northbound lanes. Investigators would like to talk to anyone who drove by the scene before the freeway was closed.

The CHP is working with police on the investigation.

A man on his way home from the Warriors game said he pulled up to the scene right behind an ambulance.

"We were about 10 cars back when traffic just came to a stop," said Andy Anderson. "We looked over, and there was a body in front of a white car on the freeway."

Anderson said he drove by just minutes after the shooting. He said he had no idea what had occurred until he saw it on Twitter. He assumed a pedestrian had been struck and killed.

The northbound lanes were reopened at 2:34 a.m. Friday. Before that, traffic was being diverted off I-880 at Fifth Avenue.

The two killings brought Oakland's homicide total for the year to 37. Last year at this time, there were 46 killings in the city.

Police and Crime Stoppers of Oakland are offering a reward of up to $20,000 for information leading to the arrest of the killer. Anyone with information is asked to call police at 510-238-3821 or a tip line at 510-773-2805.